| Author: | Yu, Tin-fu |
| Title: | Design and analysis of fiber optic gratings |
| Degree: | M.Sc. |
| Year: | 1999 |
| Subject: | Fiber optics Diffraction gratings Hong Kong Polytechnic University -- Dissertations |
| Department: | Multi-disciplinary Studies Department of Electrical Engineering |
| Pages: | v, [81] leaves : ill. (chiefly col.) ; 30 cm |
| Language: | English |
| Abstract: | In recent decades, Fiber Optic Gratings have found their applications in various areas such as telecommunications, electrical power industry, medical usage and sensors for strain / temperature measurement. Their performance and applicability are actually depending on the design of the gratings' parameters like gratings length, fiber material, grating strength, chirping shape, apodization, etc. However, no formal and explicit relationships between the gratings performance and the design of their parameters have been established so far. In this thesis, the steady state performance of Fiber Optic Gratings against different combinations of their parameters will be analyzed by means of computer simulations (the "IFO_Gratings 2.0" - Integrated and Fiber Optical Gratings Design software, will be utilized throughout the study, with details discussed in the chapter "Theory" of this report). The use of computer simulation is essential and critical to the analysis owing to the great complexity of the mathematical formulations involved. The simulation results will be consolidated and the relationships between the grating performance and the grating parameters will be summarized and presented in this report. The results obtained are used for designing Fiber Optic Gratings of specific reflection spectrum (i.e. a sawtooth waveform), which will form the basis for a particular fibre grating sensor system (i.e. a multiplexed dynamic strain sensor system). Different approaches have been tried and the optimal one is chosen. The design is novel and the desired performance is principally achieved. Improvement opportunities are identified and the details will be discussed in the "Discussions and Conclusions" of this report. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b14854247.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 7.81 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/444